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The 1960s GE 12AU7A tubes in this precisely matched pair have pinched gray plates and halo getters. The white print on the glass has the GE logo. Both tubes test as new and are matched for both current draw (mA) and Gm.

This 1960s military spec GE 5814A is a 12AU7 tube type. It has gray plates and a halo or disc getter. The green print on the glass has the GE logo and reads "JG-5814A" (partial). Tube tests as new with balanced section and very low noise.

This early 1960s military spec GE 5814A is a 12AU7 tube type. It has gray plates, triple micas, and extra support rods. The white print on the glass reads "JG-5814A" or "JG-5814WB." Tube tests as new with very low noise.

This 1963 military spec GE 12AU7WA / 6189 tube is a 12AU7WA type tube. It has gray plates, triple micas, and extra support rods. The white print on the glass has the GE logo and reads "JG-6189 12AU7WA." Tube tests as new with low noise.

TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.